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Performance evaluation of underwater optical communications using spatial modes subjected to bubbles and obstructions
Optics Letters
|November 16, 2017
Summary
Spatial modes like Bessel modes show promise for underwater optical communication. Bessel modes demonstrated superior performance against static obstructions in underwater wireless optical communication tests.
Area of Science:
- Optical Communications
- Marine Technology
Background:
- Spatial modes are increasingly important in optical communication systems.
- Underwater wireless optical communication (UWOC) is a key technology for marine exploration.
- Different spatial modes (Gaussian, Orbital Angular Momentum, Bessel) offer unique properties for light transmission.
Purpose of the Study:
- To investigate and compare the performance of different spatial modes in underwater wireless optical communication.
- To evaluate the impact of dynamic bubbles and static obstructions on signal transmission using various spatial modes.
Main Methods:
- Experimental demonstration of underwater wireless optical communication links.
- Transmission of 1.4 Gbaud orthogonal frequency division multiplexing 16-ary quadrature amplitude modulation (16-QAM) signals.
- Assessment of signal performance under dynamic bubble and static obstruction scenarios.
Main Results:
- Dynamic bubbles caused similar power fluctuations across all tested spatial modes (Gaussian, OAM, Bessel).
- Bessel modes exhibited the best performance in mitigating the effects of static obstructions.
- Orbital Angular Momentum (OAM) modes and Gaussian modes showed reduced performance against obstructions.
Conclusions:
- Bessel modes are highly resilient to static obstructions in UWOC.
- Spatial mode selection is critical for robust underwater optical communication systems.
- Further research into Bessel mode applications for UWOC is warranted.

